Prince Harry and Meghan Markle have always looked as though they are in love and have shown signs of a mature relationship using 'tie signs', leading body language expert Judi James has revealed.

Meghan is different to other women who have joined the royal family, according to James, who said her confidence and tactile relationship with Harry goes against the norm.

Meghan gives Harry a romantic smile during their trip to Northern Ireland

James said: "Normally when women marry into the royal family they start off by being silent movie stars, they don't really speak very much and they're not tactile with their partners.

"Her body language always looked very confident which is great... when they came to Ireland she suddenly started using this really romantic adoring intense eye gaze with Harry.

"I thought it was hilarious because, like most men in the UK, they're not used to that... his body language usually says I can't believe my luck."

Meghan and Harry arrived unannounced to Belfast where they visited locations across Northern Ireland

The pair differ from Prince William and his wife Kate Middleton who weren't as tactile during their engagement according to the body language expert.

She believes that, although the two women are of a similar age, Kate looks more mature and carries herself as though she "carries the royal banner" with perfect body language whereas Meghan's body language shows that she is "clearly going to do her own Meghan thing".

James said: "I think those two different sets of body language signals is a very good thing."

Brian O'Driscoll and Amy Huberman at the IFTA Film and Drama Awards Ceremony

Looking at the body language of some Irish celebrities, Judi said Brian O'Driscoll and Amy Huberman present themselves as a power couple but have a good balance.

She said Brian doesn't look as comfortable as a celebrity whereas Amy works her pose a lot more confidently and gives off an intellectual and sassy look.

Brian Ormand and Pippa O'Connor differ in that they see themselves as a double act however Brian isn't as natural in front of the camera as Pippa is.

Judi said: "Brian tends to be posing with his hands in his pocket which can imply a desire to hide whereas she tends to have her arms down by her side, so, slightly more confident, slightly more dominant personality."

Judi James was in Ireland to celebrate the arrival of AIB's Everyday Rewards campaign where she revealed the secret smiles you can see on Ireland's savvy shoppers when they get cashback rewards.

Judi James gives Donald Trump as an example of the Smug Smile

The Smug Shopper smile, displayed by the likes of Donald Trump, is expressed by shoppers who are competitive and like to be the centre of attention where the Poker Face smile can be found on those who will suppress all their delight but on the inside they're secretly beaming. This smile can be seen on celebrities such as Kanye West or Bono.

A smile Judi James would associate herself with having from time to time would be the 'Goal Scorer Smile' where you resemble an over-excited child who just can't hide their delight and can be seen on Niall Horan or Holly Willoughby.